Thames & Kosmos Barbie STEM Kit: Science Saves the Day handleiding

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Thames & Kosmos

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Handleiding

Why is it harder to carry a heavy box up the stairs

while running than walking? That is because it requires

more power to move the box when you are running.

Power in physics means the amount of work that is

done over time. Gears are used in many diﬀerent

devices to transfer power. A gear is a rotating wheel

that is connected to an axle and has teeth or cogs. One

way gears transfer power is to cause another gear to

spin faster or slower. In the spinning closet rack model,

when you turn the small 20-tooth gear around once,

the large 60-tooth gear only turns a third of the way

around. In the rebuilt model that moves faster, when

you turn the medium 40-tooth gear

around once, the large 60-tooth gear

turns two-thirds of the way around.

You doubled the speed!

When a large gear turns a

small gear, it increases the speed

of the small gear. When a small

gear turns a large gear, it

decreases the speed but

also increases the torque,

or turning force, of the

large gear.

BONUS

Spinning Closet Rack

If you have a Barbie® Dreamhouse®

like this, you can use the included

“smart” furniture piece to motorize

the spinning closet rack! Here’s how!

EXPERIMENT

“If we change the positions of the large and

small gears, every turn of the crank will make

the dress rack turn more,” Nikki explained.

“Thank you, physics class!” Barbie said as she

picked up a gear. “Nice work!”

WHAT’S

HAPPENING?

Remove the die-cut plastic panels and

the crank. Then aach the parts shown

here.

Press the buon on the “smart”

furniture piece to turn on the motor.

The motor inside

the furniture piece

turns the axle,

which turns the

gears at the top of

the spinning closet

rack. These gears

make the hanger

belt go around!

“Smart” furniture piece

from the Barbie® Dreamhouse®

Motor

adapter piece

Bekijk gratis de handleiding van Thames & Kosmos Barbie STEM Kit: Science Saves the Day, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.